class Student(object):
    def __init__(self,name,score):
        self.__name = name
        self.__score = score
    def print_score(self):
        print('%s %s '%(self.name,self.score))
    def set__name(self, name):
        self.__name = name
    def get__name(self):
        return self.__name

sd = Student('tom',20)
sd.set__name('lisi')
print(sd.get__name)

print(type(123))